Two-Photon Physics at e+ e- Storage Rings PDF Download
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Author: H. Kolanoski
Publisher: Springer
ISBN: 3540390332
Category : Science
Languages : en
Pages : 196
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Book Description
Author: F Kapusta
Publisher: World Scientific
ISBN: 981455040X
Category :
Languages : en
Pages : 358
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Book Description
Two-photon physics, i.e. photon-photon collisions in electron-positron colliders, a relatively new field in elementary particle physics, has become very popular in the last 20 years. Many experiments have been performed in this field, and the theoretical implications (in particular in quantum chromodynamics) have been studied in much detail. Nine international workshops devoted to two-photon physics have taken place between 1973 and 1992.This meeting was particularly timely, since a new generation of electron-positron colliders is presently being built or planned. These colliders will involve a large spectrum of beam energies, but their common characteristics should be a high particle flux (luminosity). This should allow for measuring many new phenomena as well as for studying known processes with much higher precision than before. Particularly promising is the prospect of building a dedicated high-energy photon collider; this should become possible using a laser technique allowing for the “conversion” of a linear electron beam into a photon beam.Over 60 physicists (both experimentalists and theorists), mainly from European countries (France, Britain, Italy, Germany, Russia, as well as Sweden and Switzerland), discussed these new possibilities at the above meeting. Over 30 talks were presented and many extended debates took place.
Author: H. Kolanoski
Publisher: Springer
ISBN: 3540390332
Category : Science
Languages : en
Pages : 196
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Because the two photon cross section is proportional to Z[sup 4], heavy ion colliders offer an unmatched luminosity. However, because nuclei have finite sizes, the photon spectrum is gradually cut off by a nuclear form factor. For RHIC, this cutoff occurs at a few GeV; below this energy, RHIC will have the highest[gamma][gamma] luminosity in the world when it turns on. In addition to the high rates, because Z[alpha][approximately] 0.6, the nuclear environment provides a window to strong field QED and new phenomena like multiple pair production. To study[gamma][gamma] physics, regions where the nuclei interact hadronically must be avoided; this leads to roughly a factor of two loss in usable luminosity. The rates expected by the Solenoidal Tracker at RHIC (STAR) collaboration will be given. Backgrounds will be discussed, along with several rejection techniques.
Author: F. Kapusta
Publisher: World Scientific
ISBN: 981453384X
Category : Colliders
Languages : en
Pages : 358
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Book Description
Author: Ole Keller
Publisher: CRC Press
ISBN: 143984044X
Category : Science
Languages : en
Pages : 464
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Book Description
From the early wave-particle arguments to the mathematical theory of electromagnetism to Einstein's work on the quantization of light, different descriptions of what constitutes light have existed for over 300 years. This book examines the photon phenomenon from several perspectives. It demonstrates the importance of studying the photon as a concept belonging to a global vacuum (matter-free space). The book explains the models and physical and mathematical descriptions of light and examines the behavior of light and its interaction with matter.
Author: Hermann Kolanoski
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 208
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Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Recent experimental results in two-photon physics are reviewed. Possibilities for future experimentation at high [gamma][gamma] collision energies are discussed. 95 refs., 12 figs., 7 tabs.
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ISBN:
Category :
Languages : en
Pages :
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Book Description
Two-photon collisions provide an ideal laboratory for testing many features of quantum chromodynamics, especially the interplay between the vector-meson-dominated and point-like hadronic interactions of the photon. A number of QCD applications are discussed, including: jet and single-particle production at large transverse momentum; the photon structure function and its relationship to the .gamma. .-->. q anti q wave function; and the possible role of gluonium states in the .gamma gamma. .-->. rho°rho° channel. Evidence that even low momentum transfer photon-hadron interactions are sensitive to the point-like .gamma. .-->. q anti q coupling is discussed.
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ISBN:
Category :
Languages : en
Pages : 34
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Book Description
Two-photon exchange contributions to elastic electron-scattering are reviewed. The apparent discrepancy in the extraction of elastic nucleon form factors between unpolarized Rosenbluth and polarization transfer experiments is discussed, as well as the understanding of this puzzle in terms of two-photon exchange corrections. Calculations of such corrections both within partonic and hadronic frameworks are reviewed. In view of recent spin-dependent electron scattering data, the relation of the two-photon exchange process to the hyperfine splitting in hydrogen is critically examined. The imaginary part of the two-photon exchange amplitude as can be accessed from the beam normal spin asymmetry in elastic electron-nucleon scattering is reviewed. Further extensions and open issues in this field are outlined.
Author: Hermann Kolanoski
Publisher:
ISBN:
Category :
Languages : de
Pages : 44
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Book Description
